Mostly in the Highlands and Hebrides but they can be found anywhere that the pasture isn't good enough for dairy cattle.
The mature weight for a Highlander cow is around 1000 lbs. Bulls top out at only around 1700 lbs.
A herd.
Nope. It's very rare that a bovine would protect a person, unless that person has a special bond with that cow that has been established since the birth of that animal.
Average is 285 days.